FAIR VALUE DISCLOSURES, Assets (Liabilities) Measured at Fair Value on Recurring and Non-Recurring Basis (Details) - USD ($) $ in Thousands	Mar. 31, 2024	Dec. 31, 2023	Mar. 31, 2023	Dec. 31, 2022
Securities available for sale [Abstract]
Securities available for sale	$ 599,869	$ 622,762
Mortgage servicing rights	26,843	26,569	$ 25,795	$ 27,474
State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	177,648	180,575
Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	285,165	300,704
Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	40,854	41,748
Commercial Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	69,072	71,930
Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	10,801	10,765
Recurring [Member]
Securities available for sale [Abstract]
Asset-backed and other amortizing securities	16,329	17,040
Loans held for sale (mandatory)	9,686	6,615
Mortgage servicing rights	26,843	26,569
Asset derivatives	$ 18,767	$ 17,230
Derivative Asset, Statement of Financial Position [Extensible Enumeration]	Other assets	Other assets
Liability derivatives	$ (112)	$ (432)
Derivative Liability, Statement of Financial Position [Extensible Enumeration]	Accrued expenses and other liabilities	Accrued expenses and other liabilities
Recurring [Member] | State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	$ 177,648	$ 180,575
Recurring [Member] | Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	285,165	300,704
Recurring [Member] | Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	40,854	41,748
Recurring [Member] | Commercial Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	69,072	71,930
Recurring [Member] | Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	10,801	10,765
Recurring [Member] | Level 1 [Member]
Securities available for sale [Abstract]
Asset-backed and other amortizing securities	0	0
Loans held for sale (mandatory)	0	0
Mortgage servicing rights	0	0
Asset derivatives	0	0
Liability derivatives	0	0
Recurring [Member] | Level 1 [Member] | State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	0	0
Recurring [Member] | Level 1 [Member] | Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0	0
Recurring [Member] | Level 1 [Member] | Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0	0
Recurring [Member] | Level 1 [Member] | Commercial Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	0	0
Recurring [Member] | Level 1 [Member] | Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0	0
Recurring [Member] | Level 2 [Member]
Securities available for sale [Abstract]
Asset-backed and other amortizing securities	16,329	17,040
Loans held for sale (mandatory)	9,686	6,615
Mortgage servicing rights	0	0
Asset derivatives	18,767	17,230
Liability derivatives	(112)	(432)
Recurring [Member] | Level 2 [Member] | State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	177,648	180,575
Recurring [Member] | Level 2 [Member] | Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	285,165	300,704
Recurring [Member] | Level 2 [Member] | Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	40,854	41,748
Recurring [Member] | Level 2 [Member] | Commercial Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	69,072	71,930
Recurring [Member] | Level 2 [Member] | Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	10,801	10,765
Recurring [Member] | Level 3 [Member]
Securities available for sale [Abstract]
Asset-backed and other amortizing securities	0	0
Loans held for sale (mandatory)	0	0
Mortgage servicing rights	26,843	26,569
Asset derivatives	0	0
Liability derivatives	0	0
Recurring [Member] | Level 3 [Member] | State and Municipal [Member]
Securities available for sale [Abstract]
Securities available for sale	0	0
Recurring [Member] | Level 3 [Member] | Residential Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0	0
Recurring [Member] | Level 3 [Member] | Commercial Mortgage-backed Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0	0
Recurring [Member] | Level 3 [Member] | Commercial Collateralized Mortgage Obligations [Member]
Securities available for sale [Abstract]
Securities available for sale	0	0
Recurring [Member] | Level 3 [Member] | Other Securities [Member]
Securities available for sale [Abstract]
Securities available for sale	0	0
Non-recurring [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Loans held for investment	228	1,482
Non-recurring [Member] | Level 1 [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Loans held for investment	0	0
Non-recurring [Member] | Level 2 [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Loans held for investment	0	0
Non-recurring [Member] | Level 3 [Member]
Assets measured at fair value on a non-recurring basis [Abstract]
Loans held for investment	$ 228	$ 1,482